A Quantitative Study on Magnetic Configuration for Active Regionsстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:As compared with the MountWilson Magnetic Classification (MWMC), effective distance (dE) is a useful parameter because it gives a quantitative measure of magnetic configuration in activeregions. We have analyzed magnetograms of 24 active regions of different types with MWMC. We have studied the evolution of magnetic fields of five active regions using dE, total flux (Ft) and tilt angle (Tilt) quantitatively. Furthermore, 43 flare-associated and 25 CME-associated active regions have been studied to investigate and quantify the statistical correlation between flares/CMEs and the three parameters. The main results are as follows: (1) There is a basic agreement between dE and MWMC. (2) The evolution of magnetic fields can be described in three aspects quantitatively and accurately by the three parameters, in particular by dE on the analysis of δ-type active regions. (3) The high correlation between dE and flares/CMEs means that dE could be a promising measure to predict the flare-CME activity of active regions.